1311123423 has 8 divisors (see below), whose sum is σ = 1748332288. Its totient is φ = 873998424.

The previous prime is 1311123413. The next prime is 1311123431. The reversal of 1311123423 is 3243211131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311123423 - 2⁵ = 1311123391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1311123423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311123413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46890 + ... + 69432.

It is an arithmetic number, because the mean of its divisors is an integer number (218541536).

Almost surely, 2^1311123423 is an apocalyptic number.

1311123423 is a deficient number, since it is larger than the sum of its proper divisors (437208865).

1311123423 is a wasteful number, since it uses less digits than its factorization.

1311123423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41933.

The product of its digits is 432, while the sum is 21.

The square root of 1311123423 is about 36209.4383137877. The cubic root of 1311123423 is about 1094.4968735917.

Adding to 1311123423 its reverse (3243211131), we get a palindrome (4554334554).

The spelling of 1311123423 in words is "one billion, three hundred eleven million, one hundred twenty-three thousand, four hundred twenty-three".